from pathlib import Path
from unittest.mock import MagicMock

import pytest

from codebase_rag.tests.conftest import get_node_names, get_qualified_names, run_updater


@pytest.fixture
def java_modern_project(temp_repo: Path) -> Path:
    """Create a Java project for testing modern features."""
    project_path = temp_repo / "java_modern_test"
    project_path.mkdir()

    (project_path / "src").mkdir()
    (project_path / "src" / "main").mkdir()
    (project_path / "src" / "main" / "java").mkdir()
    (project_path / "src" / "main" / "java" / "com").mkdir()
    (project_path / "src" / "main" / "java" / "com" / "example").mkdir()

    return project_path


def test_java_records(
    java_modern_project: Path,
    mock_ingestor: MagicMock,
) -> None:
    """Test Java record parsing (Java 14+)."""
    test_file = (
        java_modern_project
        / "src"
        / "main"
        / "java"
        / "com"
        / "example"
        / "Records.java"
    )
    test_file.write_text(
        """
package com.example;

import java.util.Objects;

// Simple record
public record Point(int x, int y) {}

// Record with validation
public record Person(String name, int age) {
    public Person {
        if (age < 0) {
            throw new IllegalArgumentException("Age cannot be negative");
        }
        Objects.requireNonNull(name, "Name cannot be null");
    }

    public String getDisplayName() {
        return name.toUpperCase();
    }
}

// Record with static methods
public record Rectangle(double width, double height) {
    public static Rectangle square(double side) {
        return new Rectangle(side, side);
    }

    public double area() {
        return width * height;
    }

    public boolean isSquare() {
        return Double.compare(width, height) == 0;
    }
}

// Generic record
public record Pair<T, U>(T first, U second) {
    public static <T, U> Pair<T, U> of(T first, U second) {
        return new Pair<>(first, second);
    }
}

// Record implementing interface
public record Circle(double radius) implements Shape {
    @Override
    public double area() {
        return Math.PI * radius * radius;
    }

    @Override
    public double perimeter() {
        return 2 * Math.PI * radius;
    }
}

interface Shape {
    double area();
    double perimeter();
}

// Record with annotations
public record Employee(
    @NotNull String name,
    @Positive int salary,
    @Email String email
) {}

@interface NotNull {}
@interface Positive {}
@interface Email {}
"""
    )

    run_updater(java_modern_project, mock_ingestor, skip_if_missing="java")

    project_name = java_modern_project.name
    created_classes = get_node_names(mock_ingestor, "Class")

    expected_records = {
        f"{project_name}.src.main.java.com.example.Records.Point",
        f"{project_name}.src.main.java.com.example.Records.Person",
        f"{project_name}.src.main.java.com.example.Records.Rectangle",
        f"{project_name}.src.main.java.com.example.Records.Pair",
        f"{project_name}.src.main.java.com.example.Records.Circle",
        f"{project_name}.src.main.java.com.example.Records.Employee",
    }

    missing_records = expected_records - created_classes
    assert not missing_records, (
        f"Missing expected records: {sorted(list(missing_records))}"
    )


def test_java_sealed_classes(
    java_modern_project: Path,
    mock_ingestor: MagicMock,
) -> None:
    """Test Java sealed classes parsing (Java 17+)."""
    test_file = (
        java_modern_project
        / "src"
        / "main"
        / "java"
        / "com"
        / "example"
        / "SealedClasses.java"
    )
    test_file.write_text(
        """
package com.example;

// Sealed class with permitted subclasses
public sealed class Vehicle permits Car, Truck, Motorcycle {
    protected final String brand;

    protected Vehicle(String brand) {
        this.brand = brand;
    }

    public abstract double fuelEfficiency();
}

// Final implementation
public final class Car extends Vehicle {
    private final int doors;

    public Car(String brand, int doors) {
        super(brand);
        this.doors = doors;
    }

    @Override
    public double fuelEfficiency() {
        return 30.0; // mpg
    }
}

// Non-sealed implementation (can be extended further)
public non-sealed class Truck extends Vehicle {
    private final double payloadCapacity;

    public Truck(String brand, double payloadCapacity) {
        super(brand);
        this.payloadCapacity = payloadCapacity;
    }

    @Override
    public double fuelEfficiency() {
        return 15.0; // mpg
    }
}

// Sealed implementation
public sealed class Motorcycle extends Vehicle permits SportBike, Cruiser {
    public Motorcycle(String brand) {
        super(brand);
    }

    @Override
    public double fuelEfficiency() {
        return 50.0; // mpg
    }
}

public final class SportBike extends Motorcycle {
    public SportBike(String brand) {
        super(brand);
    }
}

public final class Cruiser extends Motorcycle {
    public Cruiser(String brand) {
        super(brand);
    }
}

// Sealed interface
public sealed interface Expression permits Value, Addition, Multiplication {
    int evaluate();
}

public record Value(int value) implements Expression {
    @Override
    public int evaluate() {
        return value;
    }
}

public record Addition(Expression left, Expression right) implements Expression {
    @Override
    public int evaluate() {
        return left.evaluate() + right.evaluate();
    }
}

public record Multiplication(Expression left, Expression right) implements Expression {
    @Override
    public int evaluate() {
        return left.evaluate() * right.evaluate();
    }
}
"""
    )

    run_updater(java_modern_project, mock_ingestor, skip_if_missing="java")

    project_name = java_modern_project.name
    all_calls = mock_ingestor.ensure_node_batch.call_args_list

    class_calls = [call for call in all_calls if call[0][0] == "Class"]
    interface_calls = [call for call in all_calls if call[0][0] == "Interface"]

    created_classes = get_qualified_names(class_calls)
    created_interfaces = get_qualified_names(interface_calls)

    expected_classes = {
        f"{project_name}.src.main.java.com.example.SealedClasses.Vehicle",
        f"{project_name}.src.main.java.com.example.SealedClasses.Car",
        f"{project_name}.src.main.java.com.example.SealedClasses.Truck",
        f"{project_name}.src.main.java.com.example.SealedClasses.Motorcycle",
        f"{project_name}.src.main.java.com.example.SealedClasses.SportBike",
        f"{project_name}.src.main.java.com.example.SealedClasses.Cruiser",
        f"{project_name}.src.main.java.com.example.SealedClasses.Value",
        f"{project_name}.src.main.java.com.example.SealedClasses.Addition",
        f"{project_name}.src.main.java.com.example.SealedClasses.Multiplication",
    }

    expected_interfaces = {
        f"{project_name}.src.main.java.com.example.SealedClasses.Expression",
    }

    missing_classes = expected_classes - created_classes
    missing_interfaces = expected_interfaces - created_interfaces

    assert not missing_classes, (
        f"Missing expected sealed classes: {sorted(list(missing_classes))}"
    )
    assert not missing_interfaces, (
        f"Missing expected sealed interfaces: {sorted(list(missing_interfaces))}"
    )


def test_java_switch_expressions(
    java_modern_project: Path,
    mock_ingestor: MagicMock,
) -> None:
    """Test Java switch expressions parsing (Java 14+)."""
    test_file = (
        java_modern_project
        / "src"
        / "main"
        / "java"
        / "com"
        / "example"
        / "SwitchExpressions.java"
    )
    test_file.write_text(
        """
package com.example;

public class SwitchExpressions {

    // Classic switch expression with arrow syntax
    public String getDayType(String day) {
        return switch (day) {
            case "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" -> "Weekday";
            case "Saturday", "Sunday" -> "Weekend";
            default -> "Invalid day";
        };
    }

    // Switch expression with yield
    public int getQuarter(int month) {
        return switch (month) {
            case 1, 2, 3 -> {
                System.out.println("First quarter");
                yield 1;
            }
            case 4, 5, 6 -> {
                System.out.println("Second quarter");
                yield 2;
            }
            case 7, 8, 9 -> {
                System.out.println("Third quarter");
                yield 3;
            }
            case 10, 11, 12 -> {
                System.out.println("Fourth quarter");
                yield 4;
            }
            default -> {
                System.err.println("Invalid month: " + month);
                yield -1;
            }
        };
    }

    // Switch with enums
    public double getDiscount(CustomerType type) {
        return switch (type) {
            case REGULAR -> 0.0;
            case PREMIUM -> 0.1;
            case VIP -> 0.2;
            case EMPLOYEE -> 0.5;
        };
    }

    // Switch with patterns (conceptual - for future Java versions)
    public String processObject(Object obj) {
        return switch (obj) {
            case String s -> "String: " + s;
            case Integer i -> "Integer: " + i;
            case Double d -> "Double: " + d;
            case null -> "null value";
            default -> "Unknown type: " + obj.getClass().getSimpleName();
        };
    }

    // Nested switch expressions
    public String complexLogic(int x, int y) {
        return switch (x) {
            case 1 -> switch (y) {
                case 1 -> "both one";
                case 2 -> "x=1, y=2";
                default -> "x=1, y=" + y;
            };
            case 2 -> switch (y) {
                case 1 -> "x=2, y=1";
                case 2 -> "both two";
                default -> "x=2, y=" + y;
            };
            default -> "x=" + x + ", y=" + y;
        };
    }

    // Switch statement (traditional)
    public void traditionalSwitch(CustomerType type) {
        switch (type) {
            case REGULAR:
                System.out.println("Regular customer");
                break;
            case PREMIUM:
                System.out.println("Premium customer");
                break;
            case VIP:
                System.out.println("VIP customer");
                // fall through
            case EMPLOYEE:
                System.out.println("Special handling");
                break;
            default:
                System.out.println("Unknown customer type");
        }
    }
}

enum CustomerType {
    REGULAR, PREMIUM, VIP, EMPLOYEE
}
"""
    )

    run_updater(java_modern_project, mock_ingestor, skip_if_missing="java")

    project_name = java_modern_project.name
    all_calls = mock_ingestor.ensure_node_batch.call_args_list

    class_calls = [call for call in all_calls if call[0][0] == "Class"]
    enum_calls = [call for call in all_calls if call[0][0] == "Enum"]

    created_classes = get_qualified_names(class_calls)
    created_enums = get_qualified_names(enum_calls)

    expected_classes = {
        f"{project_name}.src.main.java.com.example.SwitchExpressions.SwitchExpressions",
    }

    expected_enums = {
        f"{project_name}.src.main.java.com.example.SwitchExpressions.CustomerType",
    }

    missing_classes = expected_classes - created_classes
    missing_enums = expected_enums - created_enums

    assert not missing_classes, (
        f"Missing expected classes: {sorted(list(missing_classes))}"
    )
    assert not missing_enums, f"Missing expected enums: {sorted(list(missing_enums))}"


def test_java_text_blocks(
    java_modern_project: Path,
    mock_ingestor: MagicMock,
) -> None:
    """Test Java text blocks parsing (Java 15+)."""
    test_file = (
        java_modern_project
        / "src"
        / "main"
        / "java"
        / "com"
        / "example"
        / "TextBlocks.java"
    )
    test_file.write_text(
        '''
package com.example;

public class TextBlocks {

    // Simple text block
    public String getHtmlTemplate() {
        return """
               <html>
                   <head>
                       <title>My Page</title>
                   </head>
                   <body>
                       <h1>Welcome!</h1>
                   </body>
               </html>
               """;
    }

    // JSON text block
    public String getJsonTemplate() {
        return """
               {
                   "name": "John Doe",
                   "age": 30,
                   "address": {
                       "street": "123 Main St",
                       "city": "Anytown",
                       "zipCode": "12345"
                   },
                   "hobbies": ["reading", "swimming", "coding"]
               }
               """;
    }

    // SQL text block
    public String getSqlQuery() {
        return """
               SELECT u.name, u.email, p.title
               FROM users u
               JOIN posts p ON u.id = p.author_id
               WHERE u.active = true
                 AND p.published_date > ?
               ORDER BY p.published_date DESC
               LIMIT 10
               """;
    }

    // Text block with interpolation-like formatting
    public String getFormattedMessage(String name, int age) {
        return """
               Dear %s,

               We are pleased to inform you that your account has been created.
               Your age on file is %d years.

               Best regards,
               The Team
               """.formatted(name, age);
    }

    // Text block with escape sequences
    public String getTextWithEscapes() {
        return """
               This text contains:
               - A tab: \\t
               - A newline: \\n
               - A quote: \\"
               - A backslash: \\\\
               """;
    }

    // Concatenated text blocks
    public String getCombinedText() {
        String header = """
                        ===============
                        REPORT HEADER
                        ===============
                        """;

        String body = """
                      Content goes here...
                      More content...
                      """;

        String footer = """
                        ===============
                        END OF REPORT
                        ===============
                        """;

        return header + body + footer;
    }

    // Text block in array
    public String[] getTemplates() {
        return new String[] {
            """
            Template 1:
            Hello, World!
            """,
            """
            Template 2:
            Goodbye, World!
            """,
            """
            Template 3:
            See you later!
            """
        };
    }
}
'''
    )

    run_updater(java_modern_project, mock_ingestor, skip_if_missing="java")

    project_name = java_modern_project.name
    created_classes = get_node_names(mock_ingestor, "Class")

    expected_classes = {
        f"{project_name}.src.main.java.com.example.TextBlocks.TextBlocks",
    }

    missing_classes = expected_classes - created_classes
    assert not missing_classes, (
        f"Missing expected classes: {sorted(list(missing_classes))}"
    )


def test_java_var_keyword(
    java_modern_project: Path,
    mock_ingestor: MagicMock,
) -> None:
    """Test Java var keyword parsing (Java 10+)."""
    test_file = (
        java_modern_project
        / "src"
        / "main"
        / "java"
        / "com"
        / "example"
        / "VarKeyword.java"
    )
    test_file.write_text(
        """
package com.example;

import java.util.*;
import java.util.stream.Collectors;

public class VarKeyword {

    public void demonstrateVar() {
        // Basic var usage
        var message = "Hello, World!";
        var number = 42;
        var decimal = 3.14;
        var flag = true;

        // Collections with var
        var list = new ArrayList<String>();
        var map = new HashMap<String, Integer>();
        var set = new HashSet<String>();

        // Generic type inference
        var stringList = List.of("apple", "banana", "cherry");
        var numberMap = Map.of("one", 1, "two", 2, "three", 3);

        // Complex generic types
        var complexMap = new HashMap<String, List<Integer>>();
        complexMap.put("numbers", List.of(1, 2, 3, 4, 5));

        // Method return types
        var result = processData();
        var optional = findUser("john");

        // Lambda expressions with var
        var predicate = (String s) -> s.length() > 5;
        var function = (Integer i) -> i * 2;

        // Stream operations
        var filtered = stringList.stream()
            .filter(s -> s.startsWith("a"))
            .collect(Collectors.toList());
    }

    public void varInLoops() {
        var numbers = List.of(1, 2, 3, 4, 5);

        // Enhanced for loop
        for (var num : numbers) {
            System.out.println(num);
        }

        // Traditional for loop
        for (var i = 0; i < numbers.size(); i++) {
            var element = numbers.get(i);
            System.out.println("Index " + i + ": " + element);
        }

        // Try-with-resources
        try (var scanner = new Scanner(System.in)) {
            var input = scanner.nextLine();
            System.out.println("You entered: " + input);
        }
    }

    public void varWithAnonymousClasses() {
        // Anonymous class with var
        var runnable = new Runnable() {
            @Override
            public void run() {
                System.out.println("Running...");
            }
        };

        // Anonymous class with complex type
        var comparator = new Comparator<String>() {
            @Override
            public int compare(String s1, String s2) {
                return s1.length() - s2.length();
            }
        };
    }

    // Method with var parameters (Java 11+)
    public void processValues(var... values) {
        for (var value : values) {
            System.out.println("Processing: " + value);
        }
    }

    private String processData() {
        return "processed";
    }

    private Optional<String> findUser(String name) {
        return Optional.of("User: " + name);
    }
}
"""
    )

    run_updater(java_modern_project, mock_ingestor, skip_if_missing="java")

    project_name = java_modern_project.name
    created_classes = get_node_names(mock_ingestor, "Class")

    expected_classes = {
        f"{project_name}.src.main.java.com.example.VarKeyword.VarKeyword",
    }

    missing_classes = expected_classes - created_classes
    assert not missing_classes, (
        f"Missing expected classes: {sorted(list(missing_classes))}"
    )


def test_java_instanceof_patterns(
    java_modern_project: Path,
    mock_ingestor: MagicMock,
) -> None:
    """Test Java instanceof pattern matching (Java 16+)."""
    test_file = (
        java_modern_project
        / "src"
        / "main"
        / "java"
        / "com"
        / "example"
        / "InstanceofPatterns.java"
    )
    test_file.write_text(
        """
package com.example;

public class InstanceofPatterns {

    // Traditional instanceof
    public String processObjectTraditional(Object obj) {
        if (obj instanceof String) {
            String str = (String) obj;
            return "String: " + str.toUpperCase();
        } else if (obj instanceof Integer) {
            Integer num = (Integer) obj;
            return "Integer: " + (num * 2);
        } else if (obj instanceof Double) {
            Double d = (Double) obj;
            return "Double: " + String.format("%.2f", d);
        }
        return "Unknown type";
    }

    // Pattern matching instanceof (Java 16+)
    public String processObjectModern(Object obj) {
        if (obj instanceof String str) {
            return "String: " + str.toUpperCase();
        } else if (obj instanceof Integer num) {
            return "Integer: " + (num * 2);
        } else if (obj instanceof Double d) {
            return "Double: " + String.format("%.2f", d);
        }
        return "Unknown type";
    }

    // Complex pattern matching
    public boolean isLongString(Object obj) {
        return obj instanceof String str && str.length() > 10;
    }

    public double getNumericValue(Object obj) {
        if (obj instanceof Integer i) {
            return i.doubleValue();
        } else if (obj instanceof Double d) {
            return d;
        } else if (obj instanceof Float f) {
            return f.doubleValue();
        } else if (obj instanceof String s && s.matches("\\\\d+")) {
            return Double.parseDouble(s);
        }
        throw new IllegalArgumentException("Cannot convert to numeric value");
    }

    // Nested instanceof patterns
    public String processNestedObject(Object obj) {
        if (obj instanceof java.util.List<?> list) {
            if (!list.isEmpty() && list.get(0) instanceof String firstElement) {
                return "List of strings starting with: " + firstElement;
            } else if (!list.isEmpty() && list.get(0) instanceof Integer firstNumber) {
                return "List of integers starting with: " + firstNumber;
            }
            return "Non-empty list of unknown type";
        } else if (obj instanceof java.util.Map<?, ?> map) {
            if (!map.isEmpty()) {
                var firstEntry = map.entrySet().iterator().next();
                if (firstEntry.getKey() instanceof String key &&
                    firstEntry.getValue() instanceof String value) {
                    return "String map: " + key + " -> " + value;
                }
            }
            return "Map with unknown types";
        }
        return processObjectModern(obj);
    }

    // Pattern matching in loops
    public void processCollection(java.util.Collection<?> collection) {
        for (var item : collection) {
            if (item instanceof String str) {
                System.out.println("String: " + str.length() + " characters");
            } else if (item instanceof Number num) {
                System.out.println("Number: " + num.doubleValue());
            } else if (item instanceof Boolean bool) {
                System.out.println("Boolean: " + bool);
            } else {
                System.out.println("Other: " + item.getClass().getSimpleName());
            }
        }
    }

    // Pattern guards
    public String categorizeString(Object obj) {
        if (obj instanceof String str) {
            if (str.isEmpty()) {
                return "Empty string";
            } else if (str.length() < 10) {
                return "Short string: " + str;
            } else if (str.length() < 50) {
                return "Medium string (" + str.length() + " chars)";
            } else {
                return "Long string (" + str.length() + " chars)";
            }
        }
        return "Not a string";
    }
}
"""
    )

    run_updater(java_modern_project, mock_ingestor, skip_if_missing="java")

    project_name = java_modern_project.name
    created_classes = get_node_names(mock_ingestor, "Class")

    expected_classes = {
        f"{project_name}.src.main.java.com.example.InstanceofPatterns.InstanceofPatterns",
    }

    missing_classes = expected_classes - created_classes
    assert not missing_classes, (
        f"Missing expected classes: {sorted(list(missing_classes))}"
    )
